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1260:(x:35)=105
x:35=1260:105
x:35=12
x=12x35
x=420
Vậy x=420.
(150 x 35 x 10) :25 = 52500 : 25 = 2100
(450 x480 x 44) : (15 x 21 x11) = 9504000 : 3465 = \(\frac{9504000}{3465}=\frac{19200}{7}\)
\(=\frac{\left(15+125\right).12:2}{14.11+14.19}\)
\(=\frac{840}{14.30}\)
\(=\frac{14.30.2}{14.30}\)
\(=2\)
\(\frac{15+25+35+...+125}{14.11+14.19}\)= \(\frac{\left(125+15\right).\left(\left(125-15\right):10+1\right):2}{14\left(11+19\right)}\)= \(\frac{140.12:2}{14.20}\)= \(\frac{840}{280}\)= 3
Theo bài ra , ta có :
\(\frac{15}{x}=\frac{y}{21}=\frac{31}{105}\)
\(\Rightarrow x=5\)
Vì \(105:21=5\)
Nên \(\Rightarrow y=\frac{31}{15}\)
Vậy \(x=5;y=\frac{31}{15}\)
y \(\times\) \(\dfrac{16}{64}\) + y \(\times\) \(\dfrac{25}{100}\) + y \(\times\) \(\dfrac{1}{4}\) + y \(\times\) \(\dfrac{15}{60}\) - \(\dfrac{13}{15}\) = \(\dfrac{17}{15}\)
y \(\times\) ( \(\dfrac{1}{4}\) + \(\dfrac{1}{4}\) + \(\dfrac{1}{4}\)+ \(\dfrac{1}{4}\)) - \(\dfrac{13}{15}\) = \(\dfrac{17}{15}\)
y = \(\dfrac{17}{15}\) + \(\dfrac{13}{15}\)
y = \(\dfrac{30}{15}\)
y = 2
Cái này bằng rủ em chơi oẳn tù tì ,em ra lá còn anh ra hôn má em
\(a)\)
\(y\times15-y\times25+y\times15=3780-255\)
\(y\times15-y\times25+y\times15=3525\)
\(y\times\left(15-25+15\right)=3525\)
\(y\times5=3525\)
\(y=3525:5\)
\(y=705\)
\(b)\)
\(341 + 448 : y - 141 = 214\)
\(341 + 448 : y = 214+141\)
\(341 + 448 : y = 355\)
\(448:y=355-341\)
\(448:y=14\)
\(y=448:14\)
\(y=32\)
a) 35 : 5 và (35 x 4) : (5 x 4)
35:5= 7
(35 x 4) : (5 x 4) = 140 : 20 =7
=> 35 : 5 = (35 x 4) : (5 x 4)
b) 105 : 15 và (105 : 5) : (15 : 5)
105:15 =7
(105 : 5) : (15 : 5)= 7 : 3= 2 (dư 1)
=>105 : 15 > (105 : 5) : (15 : 5)
yx(15+35)=150
yx50 =150
y =150:50=3
yx5=713-173
yx5=540
y =540:5=108
1260:(y:35)=105
y:35=1260:105
y:35=12
y=12x35
y=420
(450+yx15):y-25=15
(450+yx15):y=15+25
(450+yx15):y=40
450+yx15=40xy
450=40xy-15xy
450=yx(40-15)
450=yx25
y=450:25
y=18